(2) An action to determine the validity of a formation or change of organization proceeding may also be brought pursuant to ORS 33.710 and 33.720 or 34.010 to 34.100.
(3) For the purpose of an action to determine or contest the validity of a formation or change of organization, the formation or change shall be considered complete and final upon the date the order of formation or the order, resolution or statement announcing a change of organization is filed with the county clerk as provided by ORS 198.780. [1971 c.727 §22; 1979 c.562 §7; 1979 c.772 §15a]